Web spreader and guide
Patent 4140574 Issued on February 20, 1979. Estimated Expiration Date: 
March 24, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 24, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2530122 2635475 2718156 2752657 2772879 2801102 3310210 Web guiding and centering apparatus Patent #: 4007865 InventorAssigneeApplicationNo. 05/889868 filed on 03/24/1978US Classes:162/257, Transverse movement of wire162/273, Wire changing and/or tensioning162/275, Means applying fluid26/77, To adjust angle of selvage-engaging roller spreader26/97, Roller spreader474/104Fluid motorExaminersPrimary: Fisher, Richard V.Attorney, Agent or FirmInternational ClassesB65H 23/02 (20060101)D06C 3/00 (20060101) D06C 3/06 (20060101) AbstractA web spreading and guiding device to maintain a running paper sheet making foraminous web comprising a wire or pick-up felt transversely taut and straight running in a papermaking machine, has a pair of free running pneumatic tires having their treads in nipping relation to one another to engage a margin of the web in the nip, the tires being carried by an arm which is pivotally biased to effect transverse web stretching bias of the tires on the web margin running through the nip. Generally one of the devices will be mounted to act on one margin of the web and another of the devices on the opposite margin of the web and the devices being cooperatively biased to stretch the web in opposite directions. Means are provided to control the tire bias for correcting any deviations of the web from a straight running path. | |
